Snow plow



. Aug. l1, 193l J. w. MCCALLUM l-:T AL

SNOW PLOW Filed Nov. 7, 1929 5 Sheets-Sheet 1 Aug. ll, 1931. J. w. MccALguM E'r AL 1,817,998

- SNOW PLOW Filed Nov. '7. 1929 5 Sheets-Sheet 2 AU@ 11, 1931- J. w. MccALLuM ET AL 1,817,998

SNOW PLOW 5 sneets-shef Filed Nov. 7, 1929 Aug. 11, 1931.

J. w. MccALLuM E-r AL 1,817,998

SNOW PLOW Fled.;Nov. 7, 1929 5 Sheets-Sheet 4 Aug. 11, 1931.

J. -W. MCCALLUM ET AL SNOW PLOW Filed Nov. '7. 1929 5 She'Sf-Sheet 5 Patented Aug. lll, 1931 ynarran sra'ras 'rarest orifice iTOI-IN VJ. MCFALLUM ANI? ALES' S. MUSCOVTCH, GF ENNIPEG, MANITOBA, CANADA .Application filed Noveniter 7, 1529, Serial No. 405,482, and in Canada July 29, 1929.

The invention relates to improvements in snow plows which can be eilectively used on railroads or elsewhere Jfor maintaining the track or road clear and an object ot the invention is to provide a device having a. main plow which will cover an area wide enough to maintain the road bed clear of snow and equipped so that it will eilr'ectively scoop up y and elevate either light or heavy quantities of snow on the road bed and discharge that snow in any selected location and wherein the main plow is adjustable vertically7 as a unit, V-sach permitting of the varying oi the depth of cut oi the plow without altering the angular position thereof.

A further object of the invention is to pro- "vide a main plow having an inclined chute over which Ythe snow may be elevated and to y Yprovide the chute with gates which can be opened to expose an endless driven elevating conveyor, such latter provision permitting of the effective elevating of the snow when 'slushy or wet snow is encountered or heavy drifts are met.

A further obj ect of the invention is to pro- 'vide in Yconjunction with the main elevating "conveyor, a derrick-crane like rear conveyor 'for receiving the snow elevated by the main conveyor and controlled so that the attend- '30`an`t can deposit the snow where desired, and

to associate with the rear conveyor a hopper adapted to turn with the same and to receive the snow discharging from the main conveyor and direct it to the underlying lower end of the rear conveyor.

A further'object is to construct all of the aforesaid parts so that they will handle fgravel or other commodities which might be encounteredon the road bed.

A' further object of the invention is to provide a plow having side elevators either of which can be operated in conjunction with themain plow and which will act to clear the selectedarca at the side of the track of snow a5 lor `other material, the said material being out altering the angular position of the conveyor and also to arrange the said side conveyors so that the front end or nose can be swung upwardly to clear permanent obstructions such as signalling and switching devices adjacent the track.

A still further object is to construct the entire machine so that there will be no possibility of the material being handled clogging' and also so that the various conveyors utilized will be power driven by suitable motors provided and such also that the moving of the main and side conveyors to their various adjusted positions can be accomplished by a motor drive directly under the control of the attendant.

A further object of the invention is to construct the various conveyors utilized so that they can be mounted readily on a flat car of usual type for railroad work and such that by modifying the carriage, the device can be used on highways or roads to equal advantage.

lVith the above more important objects in view, the invention consists essentially in the arrangement and construction of parts hereinafter more particularly described reference being had to the accompanying drawings, in which Fig. l is a side view of the complete device.

2 is a plan view thereof.

, Fig. 3 is a vertical sectional view at 3 3 Figure 2.

Fig. t is an enlarged horizontal sectional view at t-l Figure 3.

Fig. 5 is a side view of the inner side of one oit the side conveyors.

Fig. 6 is an enlarged detailed cross sectional view at 6 6 Figure 3.

Fig. 7 is a detailed view showing the drum winding crank and associated parts.

Fig. 8- is a vertical sectional view at 8&8 Figure 3 and looking rearwardly.

Fig. 9 is an enlarged detailed horizontal sectional view at 9 9 Figure 1.

- ployed.

fr'llligi 1'1 'is a vertical "sectional `view "ati by the engine 11-11 Figure 10 and showing` the adjacent rachY bar in vertical section.

ln the drawings like characters of reference indicate correspon ding` parts in the several figures.

The derice as herein shown is particularly adapted for railroad work and the various operatinav parts are mounted on the customary flat car as used by railroads, the car presenting the platform 1 carried by front and rear truck Wheels 2 and 3 mounted on the axles Ll and 5. the trucli wheels running on the usual railroad tracks 6.

Centrally somewhat towards the frontend of the platform, We locate a prime mover such as a gasoline engine T Which drives the main driving` shaft S through suitable change gears (not shown) contained in a gear box 9, The shaft 8 carries a chain `wheel S which is connected by a chain S2 passing` through the platform and operating` around a further chain Wheel 10 secured to the forward end of a. short shaft 10 rried a bearing ll secured to the under side of the platform. The shaft 10 is connected through a universal `ioint l2 with a further shaft 12 leading` rearwardly to the axle 5 and provided with a Worm 13 engaging continuously with a Worm Wheel 13 secured to the axle, the arrangement beingT such that the rear axle of the car is driven thro-ugh the parts above mentioned directly The engine shaft 7 drives the armature not shoivn) of an electric generator 14 mounted on the platform in advance of the engine and this generator is utilized to supply in any suitable manner an electrical current the Yvarious motorsriv iich We utilize for purposes later explained.

The front end of the car carries the main centrally located plou7 indicated generally by u'ence numeral 15 which plow is vertically adjustable in respect 'to the platform so that the frontend thereof can be raised or lowered in respect to the tracks.

rEhe p lmv comprisesv opposing` vertical side boards 1G which flare foruarf ly and are provided on their inner sides with lengthwise l? and 12" (see l G) to which of an elevati? end of the plate i, or other materiil Y gicund, the lifted material beine7 subsequently 'passed upwardly over the upper face of the plato and discharged over the elevated upper rear end thereof. lt will be Oliveri-.fed that the front ends of the side boards are pr vided With downrv dly extendingv extensions "X which io hay@ Y Tinii-ear e'fclgres'verrical and terminating adjacent the forward end ofthe car and their lou'er edges horizontal or parallel to the ground.

Similar reinforcing angle hars 19 are secured to the lower sides of the extensions and these are connected by a nose bar 19 underlying the forward end of the plate 1S and a rear cross bar lSX to which vve attach the lower ends of a pair of rack bars later described. vertically disposed angle bars 2O and 20 are secured to the vertical rear edges of the extensions and have their ends fastened also to the bars 1T and 17 anu the bars 19. Angularly disposed brace liars l are also secured to the inner faces of the extensions and to the bars 1T and li and these 2O and 20 and the bars Q1 support a cross bar 22 to which We pivotal'ly connect a main centrally7 located brace bar 22 which has its rear end slotted as indicated at Q2* and receivingslidably a cross pin Q3 carried by the forked lower end of the bearing;` Q3 permanently secured to the under side of tie platform. ln the lowermost position of the main plow, the pin is engaging; the forward end of the slot so thatl the bar Q2 materially reinforces the forward end of the ploiv when the saine is .v rling, taking the major part of the thrust and directing' it bach to the platform.

The plate 1S provided centrally of its length with tivo normally closed hing/ef gates and 2l which can be opened as occasion dcnun ds, the in their open posi ,ion resting; against the 1ooards 16.

Directly umlerneatli the lStates, We locate an endless driven conveyor indicated generally by the reference numeral and embodying` opposing` side boards Q, a cross plate QT connectinoj the same, upuer and lower cross shafts Z8 and 28 carried by the side boards. pairs of chain Wheels 29 on the, shafts, opposing;v endchains 25) carried by the chain Wheels and Vcross slut-S730 carried luy the chains, tlierarrangement being' such that When the shafts are driven, the scendine sides of the chains drag the cross bars over the upper face of the plate 7 so that the said cross bars will elevate any material permitted to drop thereon upon the gates being opened. The upper cross shaft 28 extends also through the side boards 1G.

The side boards 2G have their upper ends mounted on the shaft 2% and their lower ends are suspended from the angle bars 17 and 17 by suitably positioned yoke-bars Sl. and 31 bent to span the eonvej-,fer and fastened to the sides of the conveyor and havinw their extending' ends peri; iently fastened to the angle bars 1'? and 17 (see Figure To the cross bar 19X, We pernninently fasten the lower end of a. pair of spaced vertically disposed rack bars and 32. rllhe rack bars have their upper ends permanently fastened to the outer faces of the side boards 2G of the conveyor Yaiic`l"'such raclr'hars are slidably received in pairs of bearings 3S located and carried by the forward end of the platform. A cross shaft 341-. is rotatably mounted in suitable bearings carried by the platform and this shaft is provided with pinions 34 meshcoi'itinuons'ly '-w'ith the Vvteeth of the rack liars. 'y

One 'end Yofthe shaft? 34 isV provided with A"a'fwoiu i'lgearfo which is continuously in mesh withia `-worm 3G" located 'at the Vlower 'end of afvertically'extending adjnsting'shaft'; the 'upper vend Aofwhich is provided'with a hand wil-@eran f Y The side boardsl `of-the plow support an upper somei'v-h thshaped operators platform 23T-and the ilatforni ca'rriesa bearing '37 slidablyreceivingfthe shaft 36,? this per- "ini'tt-ing of-the"platforinfrising 'with the plow fwhenthe shaft 36 is agc'ljfn'sted Vto vary the post-ion offtfhenose or frontend lof the plow in relation' to `'the ground. y Obviously'a turninovement'lofthe 'shaft '36 will rotate *the cross shaft Sa'and effect through Vthe 'piiiio'ns 'and racks the raising or lov'fering of the plow and 'the-'wormand worin wheel insure vof the plow rem aining Yin any/adjusted position. .Ai'notor v38 is mounted 'on' the rear en d 1ofthe platform 3T fandfdrives the' iipjper shaft QS IAin lany 'suitable manner such as 'through a1wo1m`38-safnd wfoiin'wheel- 38X.

The platform l ispiovide'd centrally y:in ia location underlying the discharging end of Atheplow ift-h 'a vertical king bolt 3S) 'centering a.- tnrn ta'blelOand 'the t 'rn -table 'ca'rries upwardly extending':similar side bars 4l'fan'd4l which-span the: lower end 'of an endless conveyor Alf2constructed inthe same "general f'mann'er'as tlie'conveyor 25;thev vlower cross `shaft 42 of the conveyor@ being ro- Statably mounted in the *upsta-nding'bars 4l andai and the uppereross shaft 42X of't-he latter fcenveyor being -drii'fen` by va motor f3 "suitably mounted on one of the Aside `rfranfies or boardsof such latter conveyor, the drivingl "i connection-being a worm V43operated bythe motor Iand a vworm wheel 432 secured tothe shaft 42X. VThe side baisfl-l"alndll support a'hopper del positioned"underneath the upper 'e'nd-v of the plow 15 and ya'dz'ipted to collect 1 direct' the material'dischargingfroni the --plow ont-o the lower end'of'the conveyor 42.

' The upper `ends'of the bars 4l land Lll are provided 'withV opposingV bearings 45 which support a cross shaft 46 and therear "end of the conveyor@ carries 'aspa-nner bar 47. A double block and pulley tackle indicated ygenerally by the v`reference numeral 48 ex- 5 tends' between they bar 47'andthev shaft 46, '-one end of thepnlling line anchored to the shaftt and the otherend Vbeing' passed ldo.vnwardly to a windingdrum' s'f9fcarr'ied b' a r s 'shaft49""havi-n r'the ends thereof l.

y C O s 5 u L f of the pairs with pinions 56.

rotatably Viiiounted in the upright arms '41 andlll. The sha-ftillfl isfactiiated by-aw'znd crank 49X rand a lrear wheel^5l and en- Edog V51flo`ck the drum-againstrotatien in one direction. ccor'din'g to the'a'bov'e -f'airaiigeiiient,onecani-aise lor lower the rear fiend -of the' conveyor by manipulating the Cifnl. 1

Y of the main track. Y tails yot the two side plowsare identical as isv fAs above described,'the forward end of the conveyor L2 is mounted on the platform so that the rear end thereof can be 'swung 'laterally to discharge its load where desired Veither centrally of the track orat the sides thereof and suitable means is provided for laterally swinging the conveyor, such being fhereinshown as a Aworm 'wheel 52 associated with the turn table, a worm 52 engaging the worm wheel and carried by ashaft 53, the" "formfST and is'provided with a hand wheel "54K According to this arrangement. the operator can by manipulating ther hand wheel 5LP position' the rear end of the conveyor l2 to wherever he desires to dump the load and the conveyor becomes automatically locked in any adjusted vposition through the worm -and worm wheel drive provided.

The Anose or front end of the plow'y l5 is of finch a width that it will Clear snow or other' "material from the track but is not wide enough sach that it will interfere with-any of the various switching or signalling devices customarily used on railroads and appearingT 4at thesides of the track. seinelocations Vto clear away snow or o her v4material lying'to t'heouter sides of the tracks Aand for this purpose we have provided side plows in the form of conveyors both similarly Constructed and both arranged so that they 'can 'be vertically adjusted in respect to the ground and without altering the angular 'position of the conveyors and so that they can: have 'their front ends raised or lowered to allow the plow to pass over an obstruction at the side of the track when the same is encountered.

The side plows or conveyors can also be used to advantage for handling snow or other material appearing in the area between a main line track and a switch line track, the right or left side con- `veyor being chosen depending onv whether the switch track is to the leftor right hand side 4As the structural de- Yalso the manner in which they are 'adjusted 'a description of one will suffice.

On the 'side ofthe platform, we mount `pairs of vbearings 55 and 55 which snp-port tintatably a lengthwise extending shaft 56 and the shaft is fitted between the bearings The .platform provided also with bearings 57 which slid- --ablv receive the lower ends of similar vertically disposed rack bars V58 and 58, the rack bars bei-ng continuously engaged by the pinions '56.

#59 permanently attacheciitoaibraeeparte exl It is desirable iny tending lengthwise of the platform and fastened thereto at intervals.

The forward end of the shaft 5G is fitted with a worm wl eel 56X which meshes continuously with a, worin 6l located at the lower end of a vertically disposed adjusting shaft (3Q, this shaft extending upwardly slidably through the platform 87 and being provided at its up ier end with a hand wheel 62. The rack bars support the side plow or conveyor' which is iiulicated generally by the reference numeral (E3. The side conveyor is structurally of the same forni the conveyor 4t2 so that it is not considered necessary to describe in detail the various parts thereof.

The lower end of the side conveyor is provided with an inclined scoop Gi suitably fastened to the side boards 65 of such conveyor and is adapted to pick up material from the ground and deliver the same onto the lower end of the conveyor. The upper end of the conveyor G3 is pivotally supported by the upper conveyor cross shaft (36 which has the ends thereof rotatably carried in inner and outer bearings 65 an d 6GX provided. rlhe upper ends of the rack bars 5S and 58 are connected by a side bar 67 and the side bar carries an upsta-nding standard GS which supports the bearing GG and a further angularly disposed standard 69 which passes outwardly underneath the upper end of tne conveyor G3 and supports the bearing 66X. A brace bar 70 extends between the uppei` end of the standard G9 and the upper end of the rack iar 58. A further brace bar 71 connects the upper end of the rack bar 5S with the lower end of the rack bar 58 and to the lower end of the bar 7l, we permanently fasten an angularly disposed bracket 7l which has the upper end thereof out turned and underlying the inner side beam G5 of the conveyor 63, the said bracket sinliporting the lower end of the side conveyor in i lowermost position.

'lhe side boards G5 carry at their lower ends a cross shaft 72 on which we slidably n'iount a sleeve 72 (see Figure 4) and to the sleeve, we connect pivotally the forked end of a tube 73 which receives telescopically the forward end of a rod 73. the rear end of which is connected by a ball and socket oint Tet to the rack bar 5S. The tube is longitudinally slotted at the sides indicated at 75 and the receive the extending ends of a cross pin 75 passing through the forward end of the rod and when the conveyor 63 is in its lower-most position, the pin isI engaged with the forward ends of the slots and the sleeve is at the outer end of the rod 7 2 and accordingly, the outer side of the nose or lower end of the conveyor 68 is supported by the tube and rofl and the latter also act to take considerable of the thrust brought on the lower end of the conveyor scoop when it working.

The upper end of the side conveyor in each instance is adapted to discharge the material elevated thereby into an inclined cross chute 7 6, the outer end of which is supported in each instance by the bar 70 and the inner end of which discharges over the upstanding sides of a collecting` pan 77 carried centrally by the platform l and having an inclined bottom directing the material discharged there onto towards the lower end of the conveyor 42. The inner end of the chute is supported by a brace 7S having the lower end fastened to the bar 67 and the upper end secured to the under side of the chute, it being here remembered that the chute moves up and down with the conveyor 63 when the rack bars are adjusted. The vertical adjustment permitted the side conveyor allows us te vary the position of the scoop 64 in respect to the ground and without altering the inclined position of the said conveyor.

As the side conveyors extend considerably to the sides of the track rails, they will strike the various switching and signalling devices adjacent the track unless provision is made for lifting the forward end of the side conveyors to pass over the obstruction. Obviously various types of lifting appliances may be used for this purpose. XVe have shown a special rack and pinion elevating device which is shortly described.

On the inner side of each of the side conveyors or plows, we have mounted a motor 7 9 and the motor shaft 7 9 is provided with a worm 8O meshing continuously with a worm wheel 80 secured to the inner end of the driving shaft 66 yof the side conveyor. This motor is of the reversible drive type and when driven in one direction, operates the side conveyor so that it will elevate the material discharged thereon by the scoop. le have provided, however, clutch members indicated generally by the reference numeral 8l associated with the motor shaft and adapted to remain in engagement and effect the driving of the conveyor for elevating purposes upon the motor shaft being turned in one direction and to slip past so that the conveyor will not be driven when the motor shaft is rotated in the other direction.

The motor shafty is also extended and utilized as a drive for a. worm 82, the worm being continuously in mesh with a worm wheel 83 rotatably mounted on the inner side board G5 of the conveyor 63 and driving a smaller pinion S4 held continuously in mesh with the teeth of a rack bar Set. r[he lower end of the rack bar is pivotally connected at to the rack bar 5S and the arrangement is such that when the worm S2 is driven, the pinion 8l will ride the rack bar 84; and consequently raise or lower the forward end of the conveyor 63 as occasion demands.

The motor shaft extended to drive the worm is a split shaft and carries a clutch member 85 fastened to one of the split ends f 4lered on the latter split end of the shaft 1s adapted tobe engaged Withtlie other clutch Ithe platform and has the lowerend s of the shaft which clutch meinberrotatably g'Supports the other of the split ends of theI shaft. .A further clutch member S6 is feathvInemberwvlien de ired by vthe endant. A

pullinglever S7 extends upwardlyftliron carried in a suitable bearing adiacent motor 2'9 (see lignrel andthe of the lever is Connected by a linlr S to the clutch member S6, th being'such that the end shift 87 engages or disengagest .S5 and 86. The upper end o L passes slida ly through the uatorm 3? and:

iid hand lat-cl in the position and S6 disthe lever carries a 89 a 90, the dog locking the leyL Where the clutch men'ibers 8 engaged. f

By'proriding the split'slialft betweentlie motor and the Worm and utilizing'- the clutch members 85 and 8G together with the clutch members Sl, We avoid the reverse driving of `the. Conveyor 63 when the 4orward or nose end of the said conveyor is being lor:- ered subsequent to the same haring been raised to pass an obstruction such as a switch stand. l/Vlien the nose of the side conveyor is being raised to avoid an obstruction, conveyor is being` driven by the motor T9 in a direction such that the upper sides of the conveyor chains there-o aseenng'but when the nose of the side conveyor is being lowered by the racl; and pinion action,` clutch members 8l are slipping past one an other so that the `conveyor cha.' is are not driven. Under certain circumstances. it may be advantageous to dispense with the side conveyors and the chutes 76 and substitute elevat-`v ing chutes and in Figure l0, We have shownthe type of chute which can be used. 4-

When the Chute indicated generally by thev eference numeral 91 is to be used, the Vside conveyors are removed, this being accomplished by disconnecting 'the Various side conveyor supporting bars atieohed to the rack bars 58 and 5 l 58 and 58 and these blocks carry pivotally outstanding arms 93 and 98 Wailea are free= to swing upwardly but are stopped in their horizontal position by Contact of the innerends tliereoil with the bloolrs as best shown in' Figure ll. The arms carry the main plate 94C of the chute which is provided at the outer side W`th an upstanding xed guard Vall 95 and at the inner side with a hinged upstand.- ing Wall 95 which when desired can `be swung down against the plate 94e. The npper end of the Wall 95 is turned inwardly across the plate 9e and a side chute hinged to the inner side of the plate, this chute being adapted to dis-charge the mateand v the plow andembodying -raelr bars ad acont the -oiiraril' end oi.

Fplatorni, A,bei rin f and s Clear the sameand the Ven 'e v 1Yaocomniodate itself by Virtue of nina-er `Connectionfte Whatever movement s chute.

Til/*hat We claim our invention is 1.- ln eon'ibination, a portableplatform, a. forwardly extending inclined plow rerlygiven the side ing the forward end of the platlornna rigid frame Work underlying the: forward end oi tieLv lly disposed i 'the earried'by the.. platform idably receiving the rack bars, a cross shaft carried by the platform, fpinions 4mounted on the shaft. and engaging the rack lthe plonf and-embodyingvertically dispose-il bars and means operable from va distant point for rotating-the lshaft to raise or lower the plow.

2. In combination, a portableplatfforni, a forwardly extend-inginclined plow overlying the forward end olf-the platfornn'a rigid frame Werl; underlying the-forward end ol' rack bars adjfacent the forward enr of 'th 1 l. el' v.' M' 1 1 Y; L" i a M ple-t n, bearings carried by vthe platform and idably receiving' the ranlr: bars, a cross -17 u; i .L n: shalt carried `by :tl e platioiln, s nimo-,is

t bars, means operable V,lor rotating the shaft-to plow and-'fha'eingthe forA .the platform, said y the forward end oftlie-plowi posi-tion and-permits of a. sl ofthe brace bar upon the vplU life then oolt the bloeis 92 and 92 (see Figure 10 to tr raelr bars ling plate and an eno-less drivenV mounted Vo'nthe v lv '..1 ..Me plow, a oiace narceneial pivotally:*attached forwardly trarne -Worlz and the rear .end tliei fr anchored to latter ieetion bein# :the brace'o reinforces owlernio designed such that cally adjusted.

3.. ln tz lcombination, a vportable and a ferwardlyc .f'posed inclined" lried thereby,'-said .pl-ou7 embodying an eleA conveyor said plate; haring a can be-o ened to explat forni nnderflyingV the saine, portion `thereoI which pose the conveyor.

e. Ylnr combination, aV portable platform, an inclined main plow carried bythe or- Ward end offthe'platiiorm and provided with an elevating plate'over which the material dugbythe 4plow is delivered, 'an endless driven coni-*eyor vcarried -by the pionY and undenlyrngY the plate, and gateslassociated with theplate'andeadapteo when opened to expose the conveyor.

Y:iinlconibination,' a portable platform, a Amain inclinedplow carried by overlying tlieloruard end of. tlieplatforn-, l

plow embodying an elevating plate over which the material dug by the plow is delivered, an endless driven conveyor underlying the plate and embodying a cross plate over which the ascending side of the conveyor drags and gates formed in the plate of the plow and adapted when opened to expose the conveyor.

6. ln combination, a portable platform, a vertically adjustable inclined main plow carried by the forward end of the platform and delivering rearwardly, similar rearwardly de` livering inclined side plows carried by the sides of the platform and bodily vertically adjustable in respect thereto and having their rear ends pivotally mounted and their for` Ward ends vertically adjustable, a rear in` clined and driven conveyor carried by the platform, said conveyor being mounted `to permit of the lateral swinging movement of the conveyor and of the vertical adjustment of the rear end thereof and having the forward end thereof underlying the rear end of the main plow, a collecting pan carried by the platform adjoining the lower end of the rear conveyor and cross chutes receiving from the rear ends of the side plows and delivering to the pan.

7. The combination with a portable platform and an inclined rearwardly delivering main plow carried by the forward end of the platform, of similar inclined rearwardly delivering side plows located at the sides of y the platform, vertically disposed rack bars slidably carried by the platform and supporting the side plows, shafts rotatably carried by the platform, pinions secured to the shafts and engaging the rack bars and means for rotating the shafts to actuate the rack bars.

8. The combination with a portable platform and an inclined rearwardly delivering main plow carried by the forward end of the platform, of inclined rearwardly delivering side plows located at the sides of the platform and carried thereby and bodily vertically adjustable in respect thereto and each independently swung to permit of the raising or lowering of the forward end thereof.

9. The combination with a portable platform and an inclined rearwardly delivering main plow carried by the forward end of the platform, of similar rearwardly delivering inclined side plows carried by the sides of the frame and mounted to permit of vertical adjustment without altering the angular position thereof and of the raising of their forward ends to pass road obstructions.

10. The combination with a portable platform and an inclined rearwardly delivering main plow carried by the forward'end of the platform, of similar plow supporting frame structures located at the sides of the platform and embodying vertically disposed rack bars adjacent the platform, bearings carried by the platform and slidably receiving the rack bars, shafts rotatably carried by the platA form, pinions secured to the shafts and en gaging the rack bars, means for rotating thc shafts to adjust the rack bars and elevate o1 lower the frames and similar rearwardly de livering plows carried by the frames and ver tically adjustable therewith and having theii rear ends pivotally mounted and their fron ends verticall. adjustable.

11. In com ination, a portable platform a rearwardly delivering inclined main plov carried by the forward end of the platforn and vertically adjustable in respect thereto said plow embodying an elevating plate, ai endless conveyor underlying the same an gates associated with the plate and adapte( when opened to expose the conveyor, an ele vated operators platform carried by the plo\V and vertically adjustable therewith and i motor mounted on the platform and drivin,I the adjacent upper end of the conveyor.

Signed at lVinnipeg, this 2nd day o August, 1929.

JOHN lV. MCCALLUM. ALEC S. MUSCOVITCH. 

